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Behavioural Neurology
Volume 2018, Article ID 5971385, 14 pages
Research Article

The Effects of Transcranial Direct Current Stimulation on the Cognitive Functions in Older Adults with Mild Cognitive Impairment: A Pilot Study

1Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, Hong Kong
2Department of Occupational Therapy, Monash University, Melbourne, VIC, Australia

Correspondence should be addressed to Kenneth N. K. Fong; kh.ude.uylop@gnofknsr

Received 29 September 2017; Revised 16 December 2017; Accepted 22 January 2018; Published 15 March 2018

Academic Editor: Foteini Christidi

Copyright © 2018 Pablo Cruz Gonzalez et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. The aim of this pilot study was to investigate whether the use of anodal transcranial direct current stimulation (tDCS) on the left dorsolateral prefrontal cortex could boost the effects of a cognitive stimulation (CS) programme using a tablet on five older adults with mild cognitive impairment (MCI). Method. A single-subject study of A-B-C-A design was used. After the baseline with the administration of CS (phase A), a sham treatment with CS was applied (B). Following the withdrawal of sham treatment, tDCS was introduced in combination with CS (C). Finally, phase A was replicated a second time. Results. tDCS had a significant effect on processing speed, selective attention, and planning ability tasks in terms of performance and completion time. Conclusion. tDCS appears to have a positive impact on some cognitive components in CS in persons with MCI. Further study on its long-term effects and generalization of power to daily activities is warranted.